Composition of matter for use in welding copper and steel



can be emp oyed e Patented Jan. 6, 1931 ,uoaan,

PATENT OFFICE m n'rra men rm, or

'muxuns.

mnmmsor OOIPOEITIOII OI I03 USE U WELDING COPPER AND um Drawing.

that changes ma be made in the scope of the claims without eparting from the spirit of the invention claimed. j

In practice it is first necessary to use a mixture of the. followin ingredients in the proportions stated, name y,

Partsb? volume Copper -e 10 Zinc Lead... 1

The forego' ingredients are melted and mixed. v The lilixture is allowed to cool and is then ground to a finely comminuted condition. I

Two parts of the, pulverized preparation are mixed with two parts of borax and one part of copper sulfate.

The iron or steel to which the copper is to be joined is heated to between 1400 F and 1500 F. Borax is applied to prevent oxidation. The area to be treated is then covered with a coatin of the compositionabout inch thick. he tem steel is then increase to about 1900" F. and after about 1 minutes all signs of the composition will have disappeared. More borax is then a plied after w 1011 copper at a tem rature 0 approximately 2050 F. is

app 'ed either by pouring, dipbping or otherwise. Excellent results are 0 tained by the use of'an'electric oven.

This com ition when used as explained,

fliciently :as a welding flux on any ade of iron or steel whereby copper can be joined thereto or used for plating.

Co per and iron or steel joined as described will held together securely and the joint 4.5 will resist excessive compression, tensile and torsional strains.

What is claimed is:

I. A flux for use in joining co per to iron or iron alloys includin amateria mixed with so borax and copper s fate, said material inrature of theiron or Application am A ril 1a, 1920. lerial Io. 443,913.

eluding copper, zinc and lead mixed while in a molten state and subsequently cooled and reduced to a finely 'comminuted. state. 2. A flux for use in joining copper to iron or iron alloys, including two parts vof borax andone art of copper sulfate mixed with two parts 0 a commmuted reparation consistmg of copper, 10 parts, zmc 25 parts and lead 1% parts which have been mixed while in a molten state, cooled, and reduced to a comminuted state.

In testimony that we claim the foregoing as our own, we have hereto ailixed our si 'natures.

EMANUEL J. seHAFfNER. vNORA E. SGHAFFNER.

KATIE EHMGKE FIELD. 

